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　　3月23日，中鐵(tie)隧(sui)(sui)道(dao)(dao)施(shi)工(gong)(gong)的(de)廈(sha)門翔安(an)海(hai)(hai)(hai)(hai)(hai)(hai)底(di)隧(sui)(sui)道(dao)(dao)A1標段(duan)(duan)(duan)在(zai)四標段(duan)(duan)(duan)中率先(xian)達(da)到(dao)分界(jie)(jie)里程(cheng)(cheng)，國(guo)內首條海(hai)(hai)(hai)(hai)(hai)(hai)底(di)隧(sui)(sui)道(dao)(dao)世(shi)界(jie)(jie)性(xing)(xing)地(di)質(zhi)難(nan)(nan)題(ti)——F4風(feng)(feng)化(hua)(hua)(hua)(hua)深(shen)(shen)槽(cao)(cao)(cao)段(duan)(duan)(duan)被成(cheng)功(gong)攻(gong)(gong)克。風(feng)(feng)化(hua)(hua)(hua)(hua)深(shen)(shen)槽(cao)(cao)(cao)是海(hai)(hai)(hai)(hai)(hai)(hai)底(di)隧(sui)(sui)道(dao)(dao)建(jian)設(she)中公(gong)認(ren)的(de)世(shi)界(jie)(jie)性(xing)(xing)地(di)質(zhi)難(nan)(nan)題(ti)，也(ye)是國(guo)內首條海(hai)(hai)(hai)(hai)(hai)(hai)底(di)隧(sui)(sui)道(dao)(dao)建(jian)設(she)成(cheng)功(gong)與否的(de)關鍵所在(zai)，其為砂(sha)、高(gao)風(feng)(feng)化(hua)(hua)(hua)(hua)石、泥(ni)水(shui)的(de)混合堆(dui)積地(di)層(ceng)，自穩(wen)能力(li)差，加上(shang)海(hai)(hai)(hai)(hai)(hai)(hai)底(di)高(gao)水(shui)壓(ya)作用，稍(shao)有不(bu)慎，便(bian)有覆頂之災。在(zai)眾風(feng)(feng)化(hua)(hua)(hua)(hua)深(shen)(shen)槽(cao)(cao)(cao)段(duan)(duan)(duan)中以F4風(feng)(feng)化(hua)(hua)(hua)(hua)深(shen)(shen)槽(cao)(cao)(cao)段(duan)(duan)(duan)最(zui)為困(kun)難(nan)(nan)，F4風(feng)(feng)化(hua)(hua)(hua)(hua)深(shen)(shen)槽(cao)(cao)(cao)段(duan)(duan)(duan)位(wei)于整個海(hai)(hai)(hai)(hai)(hai)(hai)底(di)隧(sui)(sui)道(dao)(dao)最(zui)深(shen)(shen)處，水(shui)壓(ya)達(da)0.7兆(zhao)帕，長(chang)度最(zui)長(chang)達(da)120米，地(di)質(zhi)條件復雜，技術(shu)難(nan)(nan)度巨(ju)大。中鐵(tie)隧(sui)(sui)道(dao)(dao)對F4風(feng)(feng)化(hua)(hua)(hua)(hua)深(shen)(shen)槽(cao)(cao)(cao)開挖的(de)特殊性(xing)(xing)和(he)巨(ju)大的(de)安(an)全風(feng)(feng)險，多次組織(zhi)專家對風(feng)(feng)化(hua)(hua)(hua)(hua)深(shen)(shen)槽(cao)(cao)(cao)施(shi)工(gong)(gong)方案進行嚴謹的(de)科學(xue)論證，細化(hua)(hua)(hua)(hua)施(shi)工(gong)(gong)組織(zhi)方案，健全應急(ji)措(cuo)施(shi)，率先(xian)在(zai)行業內建(jian)立(li)起地(di)下工(gong)(gong)程(cheng)(cheng)攻(gong)(gong)克軟(ruan)弱圍巖的(de)“特種部(bu)隊”，經過近8個月的(de)攻(gong)(gong)堅克險，順利通(tong)過F4風(feng)(feng)化(hua)(hua)(hua)(hua)深(shen)(shen)槽(cao)(cao)(cao)段(duan)(duan)(duan)，率先(xian)打到(dao)分界(jie)(jie)里程(cheng)(cheng)，以技術(shu)優勢和(he)堅毅精(jing)神成(cheng)為我國(guo)首條海(hai)(hai)(hai)(hai)(hai)(hai)底(di)隧(sui)(sui)道(dao)(dao)建(jian)設(she)的(de)先(xian)行者，建(jian)設(she)過程(cheng)(cheng)中的(de)一系(xi)列技術(shu)創(chuang)(chuang)新、通(tong)過風(feng)(feng)化(hua)(hua)(hua)(hua)深(shen)(shen)槽(cao)(cao)(cao)段(duan)(duan)(duan)的(de)工(gong)(gong)法(fa)、工(gong)(gong)藝(yi)，成(cheng)為其他標段(duan)(duan)(duan)借鑒(jian)對象，為海(hai)(hai)(hai)(hai)(hai)(hai)底(di)隧(sui)(sui)道(dao)(dao)建(jian)設(she)提供了一系(xi)列具有開創(chuang)(chuang)意義的(de)新工(gong)(gong)藝(yi)流程(cheng)(cheng)，豐富(fu)了我國(guo)海(hai)(hai)(hai)(hai)(hai)(hai)底(di)隧(sui)(sui)道(dao)(dao)建(jian)設(she)工(gong)(gong)法(fa)、工(gong)(gong)藝(yi)。